Biden panned for not being certain about whether he watched the debate: 'He doesn't know???'

President Biden was roasted on social media after expressing uncertainty over whether he had watched his performance at last week's presidential debate during his ABC News interview.

In a preview clip that aired on Friday's "World News Tonight," ABC News anchor George Stephanopoulos pressed Biden on if he had comprehended how poorly he did in his face-off against former President Trump. 

"Did you ever watch the debate afterwards?" Stephanopoulos asked.

After a brief pause, Biden replied...